opkg_manager: add a list of packages to hide

Advanced build system can come up with an impressive list of
(sub-)packages, most of them not really interesting for installation
through the GUI. Add a filter with simple patterns to suppress the
display of those packages.
TODO: this should be made configurable via a run-time config file.

Signed-off-by: Markus Volk <f_l_k@gmx.net>

src/gui/opkg_manager.h

@@ -67,6 +67,7 @@ class COPKGManager : public CMenuTarget
 		int showMenu();
 		void updateMenu();
 		void refreshMenu();
+		bool badpackage(std::string &s);
 
 		struct pkg {
 			std::string name;